No DNS service

I had a panic kernel last week and managed to get my imac rebooted via ethernet cable (Time Capsule/ Time Machine) and everything seen to work. Today I get a message stating that the following"
1. I have a double NAT and the computer suggested that I use bridge mode
2. It also states that I have no DMS service
Any suggestions
Bob

I did this to no avail, I did contact my internet provider (Cox)) and they said that my 4 year modem is dying because the cable light on my modem blinks very slowly or sometimes doesn't blink for 5-10 seconds? They suggested buying a new one because this one only has 2 data ? ports and the newer ones have multiple ports. Any suggestions, I am thinking Cisco vs Netgear
Thanks anyway, I do appreciate the help
GB

Similar Messages

How to resolve a host name from IP using JNDI/DNS service provider

Hi
I got two questions on JNDI/DNS service provider:
1) How to resolve a host name when i got an IP
I understand How I do it inverse.
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.dns.DnsContextFactory");
env.put(Context.PROVIDER_URL, "dns://"+server+"/"+domain);
DirContext ictx = new InitialDirContext(env);
Attributes attrs1 = ictx.getAttributes(host, new String[] {"A"});
2) This example above works when I specify the domain in the provider url.
If I am not specifing a domain but only the dns server I got an NameNotFoundException.
What should I do if I don't got the domain?
get the availible domains and loop on them?

Hi,
if your DNS server supports that, you can do a reverse DNS lookup. This works as follows:
String server = "your.dns.server";
String domain = "in-addr.arpa";
String ip = "4.3.2.1";
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.dns.DnsContextFactory");
env.put(Context.PROVIDER_URL, "dns://" + server + "/" + domain);
DirContext ictx = new InitialDirContext(env);
Attributes attrs1 = ictx.getAttributes(ip, new String[] {"PTR"});1: Use the pseudo-domain in-addr.arpa
2: Use the reverse IP address for lookup, i.e. if your host has 1.2.3.4, use 4.3.2.1!!
3: Request the PTR attribute
see also [http://en.wikipedia.org/wiki/Reverse_DNS_lookup|http://en.wikipedia.org/wiki/Reverse_DNS_lookup]
Martin

Windows Server 2008 R2 DNS service issue with BitLocker

I recently installed BitLocker on a Windows Server 2008 Platform. I did not encrypt the boot partition because the server hardware BIOS did not have the necessary requirements to encrypt the system drive.
The Server roles are ADSM, DC and File Server. For DC operation I am also running the DNS service.
When I installed the DNS role I was prompted to install the Log files on a different volume than the OS. I did this, but unfortunately, it was the same volume that was encrypted.
Since I could not encrypt the system disk, the encrypted volume must be unlocked via password in order to mount. Here in lise my problem.
When I do a full reboot of the server, I get to the point in the boot process where my mouse is visible and operational (this would be just before the Windows OS logo displays, I believe), then the server reboots. On the next boot up I am given the diagonstics
and recovery dialog because the OS failed to boot.
I believe the failure is the DNS service trying to launch, but because the log files are on the encrypted drive and it has not been unlocked, the system sees this as a security problem and reboots
Does this make sense? If it does, is there a way to boot 2008 R2 with the DNS service disabled, say with the original install disk in recovery mode?
Any help would be greatly appreciated as this system cannot be booted in its current state.
Peter C. Hesse Network/Systems Administrator

Hi,
I believe you mean the Active Directory Logs not the DNS logs, because these are necessary to startup a domain controller, because the AD database depends on these logs.
So if you have AD logs on a different partition and that is encrypted with Bitlocker you could probably automatically unlock it.
So you did not encrypt OS partition because the server does not have a TPM fully compliant chip ?
manage-bde /?
manage-bde -autounlock -enable Driveletter:
But you have to be able to boot server normal mode I am not sure if the command can be used in DSRM mode.
Below are some links that might help:
http://social.technet.microsoft.com/Forums/windowsserver/en-US/c52ffc7d-f822-4b61-b633-46f8e04eac80/bitlocker-for-domain-controller
Hope this helps.
Regards,
Calin

Non-ISP DDNS with Apple DHCP and DNS Services

I have two questions about Dynamic DNS (DDNS) as it applies to Apple's DNS and DHCP services within my home network. I am not talking about DDNS in the context of making my external-facing router available by a domain name on the Internet using the dynamically-assigned IP from my ISP.
Starting with Snow Leopard Server, I attempted to use Apple's DNS and DHCP services (I have the firmware-based DHCP service in my router turned off.) The difficulty I immediately faced was that Apple's DHCP implementation didn't update the DNS service as IPs were handed out to DHCP clients. Because of this, it wasn't possible to access hosts by their hostname, since getting a DHCP-assigned dynamic IP at boot-up didn't do anything to automagically register the hostname-to-IP mapping in DNS. Manually registering the hostname in DNS was pointless, becuase over time the client IP address can and did change. I could create static IP assignments based on the MAC address, but doing that for all of the devices on my home network sort of defeated the purpose of using dynamic IPs.
The only solution I eventually found was to go out and get an open source DHCP server, compile it for my Mac, install it, and configure it. After doing this, everything worked great; every time a new host or other device was booted it got a dynamic IP through DHCP, and then the DHCP server automatically updated Apple's DNS serive with the hostname and assigned IP. I could immediately access every device on my network by hostname. As IP addresses changed over time, the hostname-to-IP mapping in DNS was automatically updated.
Except, Apple's point upgrades kept breaking my non-Apple DHCP install. Every time I applied software updates to my server I had to go back and re-finagle DHCP to get it to automatically start and run. By the time Lion Server came out, I drank the Kool-Aid and went back to Apple's DHCP implementation. I was disappointed that it still didn't seem able to update DNS with hostnames as it assigned IPs, but I was so tired of mucking about at the command prompt to fix DHCP every time Software Updates broke it, I just lived with the inconvenience of not being able to access devices on my network by hostname.
I'm sorry to say this, but Windows Server has had this capability since at least server 2003. In fact, until I dumped my Windows Server and switched to Snow Leopard Server, I was running Microsoft's DNS and DHCP services on Server 2003 and they did exactly what I'm describing brilliantly.
Can anyone offer any advice here? Does Mountain Lion's implementation of DHCP allow for DDNS updates to the DNS service? If not, how are other people handling this? Should I go back to running Windows Server for my DNS and DHCP services? My Netgear WNDR3700 router appears to have the standard, substandard DHCP server in firmware as most home routers, and no facility for DNS at all--much less the ability to update an on-site DNS sever with IP addresess it hands out. In fact, the only appliance I know of that does this is the InfoBlox my employer uses, but that's too expensive for a home solution.
As a Post Script, I'll add that I've been VERY unhappy that I lost the ability to bind Windows clients to Open Directory under Lion Server. Since I'm starting to see articles that say this capability hasn't been added back to Mountain Lion Server, I'm seriously considering implementing a Windows Server AD master and establishing a "magic triangle" or "golden triangle". If I end up having to do that, I wonder if I might as well just go back to using Microsoft's DNS and DHCP services.

Hi,
Whether to move your DHCP to another server depends on the workload of your server. If there are too many clients on the network, you should move your DHCP to another server.
Did the record which owned by the machine generate before you configure the DnsUpdateProxy group? You can try to regenerate the record and check the result.
For more detailed information, you can view the link below.
DNS best practices
http://technet.microsoft.com/en-us/library/cc778439(v=ws.10).aspx
Using DNS servers with DHCP
http://technet.microsoft.com/en-us/library/cc787034(v=ws.10).aspx
DNS registration changes for Windows Server 2003 based DHCP Servers
http://technet.microsoft.com/en-us/library/ee441167(v=ws.10).aspx
Hope this helps.
Steven Lee
TechNet Community Support

Java Web Start and DNS Service Provider

I have an implementation of a DNS Service Provider that works fine as an Application. But when deployed as an applet or application through Java Web Start, it is not picking up the DNS provider override
It is like this. I have a Simple Test Program
dabba#cat Test.java
import java.net.*;
import sun.net.spi.nameservice.NameService;
import sun.net.spi.nameservice.dns.DNSNameService;
public class Test {
public static void main(String args[]) throws Exception{
try {
System.setProperty("sun.net.spi.nameservice.provider.1", "dns,mine");
InetAddress ia = InetAddress.getByName(args[0]);
System.out.println(ia);
catch(Exception e) {
System.out.println("in exception handler" + e);
dabba# cat MyNameService.java
import sun.net.spi.nameservice.NameService;
import sun.net.spi.nameservice.dns.DNSNameService;
import java.net.UnknownHostException;
public class MyNameService implements NameService {
static {
//System.setProperty("sun.net.spi.nameservice.nameservers", "localhost"); // ETL
NameService ns;
public MyNameService() throws Exception {
ns = new DNSNameService();
public byte[][] lookupAllHostAddr(String host) throws UnknownHostException {
System.out.println("*** lookup host = " + host);
byte[][] a = new byte[1][4];
a[0][0]=(byte)127;
a[0][1]=0;
a[0][2]=0;
a[0][3]=(byte)1;
System.out.println("return a.length = " + a.length);
return a;
public String getHostByAddr(byte[] addr) throws UnknownHostException {
throw new Error("not implemented");
dabba#cat MyNameServiceDescriptor.java
import sun.net.spi.nameservice.*;
public final class MyNameServiceDescriptor implements NameServiceDescriptor {
public NameService createNameService() throws Exception {
return new MyNameService();
public String getProviderName() {
return "mine";
public String getType() {
return "dns";
dabba#cat META-INF/services/sun.net.spi.nameservice.NameServiceDescriptor
# dns service provider descriptor
MyNameServiceDescriptor
dabba# java -cp . Test www.sun.com
*** lookup host = www.sun.com
return a.length = 1
www.sun.com/127.0.0.1
So the above program works as intended as an application. Whatever hostname I specify, it returns localhost. Now, I'm not able to get this to work when I embed this in an Applet or Application launced through Java Web Start. Am I missing something
thanks,
Balaji

We are trying to do the same thing for a different purpose. You need to set the override sooner than WebStart lets you... It has to be on the command line.
We are trying to overide the default nameservice because it uses reverse dns which is slow at some of our sites. We need to set the parameter
sun.net.spi.nameservice.provider.1=dns,sun before the VM starts using webstart. The only way we can do this is by setting the environment variable
JAVAWS_VM_ARGS=-Dsun.net.spi.nameservice.provider.1=dns,sun on the client. This is not real easy from the server side.
Is there any way we can make the client default to this nameservice provider? There must be some file somewhere on the client I can put this property in...

What is DNS Services and why does it use so much data?

I have 300MB to use a month on my iPhone 4S (most recent iOS) and I'm normally pretty good with it because I'm connected to WiFi a lot. All of a sudden, my data usage spikes and my DNS services usage has gone up to 40MB. What is this and how do I keep it from spiking like this? It's incredibly annoying.
Also, any other tips on saving data while connected with the 3G? As mentioned before, I only have 300MB so I like to stretch it for the month.

DNS (Domain Name Service) is the Internet "address book" of web sites. Whenever you go to a site such as http://apple.com your browser must make calls to the DNS server specified in your Network Settings to translate "apple.com" into Apple's IP (Internet Protocol) address of 17.178.96.59. Any time you access any Internet resource (such as sending or receiving email, playing multi-player games, using a browser, Using any app that accesses data on the Internet such as news, weather, stocks, etc) one or more DNS lookups must be made. Many web sites have content from several different sites. Each site referenced on the page must also be looked up. Each query is small (~100 bytes), but they can add up.

Lion Server DNS service not working for locally created zones. Caching working fine.

OS Lion Server DNS service not working for local zones. Was fine under Snow leopard server but Lion server upgrade has severely broken my DNS and web sites. Zones look fine under Server Admin but keep getting "query failed (SERVFAIL) for xxxx at /SourceCache/bind9/bind9-42/bind9/bin/named/query.c:3921" in the logs. BTW - Server Admin cant seem to see the log file either.
Surely someone actually tested that DNS still worked on Lion?

I upgraded from Snow Leopard Server to Lion Server on day 01. I hit the same issue where, after the upgrade, my Lion Server stopped serving names for my private local domain.
I finally took a few minutes to figure out what was wrong. After turning on debug logging and looking through the logs, I found my particular issue, now resolved.
The issue I had was, when the domain initially was setup when I installed Snow Leopard Server, for some reason it created a zone just for the server (in my case, something like zone "s-01.mydomain.priv"), and a separate zone for all the other machines (zone "mydomain.priv", containing all the private IPs for my local domain). I never messed with it because it worked, but generally I would have put all of them in the same zone.
My zone "mydomain.priv" had a nameserver and mail exchanger entry for my server, s-01.mydomain.priv. I could see this in the Server Admin app on the DNS bubble, Zones tab, mydomain.priv selected, and the General Info panel. This was fine in Snow Leopard. This was failing the zone load in the updated bind for Lion Server, though. The issue was that the "mydomain.priv" zone was referencing the s-01.mydomain.priv server, which was not defined in the "mydomain.priv" zone but rather in the "s-01.mydomain.priv" zone.
My fix:
1. In Server Admin, add the server to the zone "mydomain.priv". I put an A record (Add Machine) in the "mydomain.priv" zone for my server named s-01.mydomain.priv.
2. shut down DNS on the OS X Lion Server (hit the Stop DNS button on Server Admin).
3. edit /etc/named.conf by hand, removing the specialized zones that contianed just the server. In this case, it would be the section titled 'zone "s-01.mydomain.priv"' and the section titled 'zone "3.10.1.10.in-addr.arpa"'. Your in-addr.arpa zone name will change based on whatever your server IP address was. My internal one happened to have s-01.mydomain.priv mapped to 10.1.10.3.
4. Once the specialized zones for just the server were removed, I started the DNS up again. Instead of serving four zones as it had in OS X Snow Leopard Server, it now servers two zones. And, now, it is resolving my local machines for the mydomain.priv zone.
YMMV. I did note that it wasn't totally necessary to do step 3, but I never really understood the need for the specialized domain, and keeping it around would have a copy of data that would just confuse things.
Hope that helps. That's been the only hiccup I've noticed updating to OS X Lion Server thus far.

Running DNS service for SCAN in the openfiler VM

Grid version     : 11.2.0.3
Guest OS     : Oracle Enterprise Linux 6.3
Host OS          : Windows 7 (64-bit ) with 16gb Physical RAM
Hypervisor : Virtual Box 4.2.6
Openfiler version : 2.99
Using virtualBox, I am setting up a 2-node RAC node on Oracle Linux.
I have a 3rd VM which runs openfiler ( NAS )
For using SCAN feauture, I would like to run a DNS service as mentioned in the article below
http://www.oracle-base.com/articles/linux/dns-configuration-for-scan.php
I don't want to run the DNS service in any of the two RAC nodes. Instead of creating a separate VM just for the DNS , I am thinking of running it in the Openfiler VM.
Openfiler is running in a Linux Distro called rPath. I am not sure if the packages mentioned in the above oracle-base.com article is available in this distro. Has anyone run a similair DNS service in the Openfiler OS ?

I doubt it. OpenFiler is a "stripped-down" OS.
But Wait ! A Google search returned this : http://www.denbraber.org/?p=4
Hemant K Chitale
Edited by: Hemant K Chitale on Apr 22, 2013 5:10 PM

Is a Dynamic DNS Service included in my FiOS Bundle?

I have the FiOS TV, Phone & Internet Bundle (internet upgraded for $5 extra for faster speeds) and switched from Cable.
I know that Cable provided all of their Boost internet premium speed customers with a bundle of goodies, including a Dynamic DNS service.
Does Verizon offer Dynamic DNS service included as well?
If not, which is easiest to use (I have a Mac running OS X 10.5.7)
I noticed that my FiOS Router Firmware has Dynamic DNS section, but it's very unclear as to if it is meant for a Verizon specific service or a third party service.
Please advise; thanks!
--> Screenshot of Verizon Router Firmware screen - click here.
Message Edited by FireFish on 06-02-2009 01:22 AM
Message Edited by FireFish on 06-02-2009 01:22 AM

That screen you captured is where you would enter your dyndns.org account info and thereby get dynamic dns running on your setup.
It's not really accurate to say the service is 'included' in the bundle, it's just that the router is capable of talking with this 3rd party service - most routers can do so nowadays.

Not clear about dns service for new Mac 10.4 server

Due to low budget, I am given the task to convert a powermac g4 into a Mac 10.4 server. I have already installed it as a stand alone master but will promote it to directory master as soon as I configure proper dns setup.
Now my westell router shows that the dns is 192.168.1.1 and the domain name as myhomwestell.com, does that mean my zone name has to be westell.com? Can having both dns service conflict with each other or is it fine?

http://discussions.apple.com/message.jspa?messageID=5409254#5409254
lookup my posts on DNS setup to help you about. Please mention if you want to go full a Fully Qualified Domain Name Setup or just a local setup . Do you dispose of a fixed public IP address as well ?

I have DHCPand DNS services in a router and I want to install domain controller

Hello
I have a sonic wall router managing the DHCP and DNS services for a my network and wanna keep it doing this.
I have a computer running windows server 2012 standard and installed active directory along with DNS. I also went to the DNS manager of these server and forwarded the DNS addresses of my router. For some reason I'm not able to join a client computer
into the DC.
I got this error:
An Active directory domain controller (AD DC) for the domain "mydomain.ca" could not be contacted.
Is it possible to configure active directory using the DNS and DHCP services of my router? or Am I doing something wrong?
Can somebody helping me with this matter?
Thanks.

Hello,
if the DNS server on your router is able to provide all required zones, SRV records and options that the DCs require there is no problem using 3rd party DNS servers.
But I would recommend that you u se the DC as DNS server also and just run the installation during the promotion process.
All clients MUST use the domain internal DNS servers on the NIC NONE else otherwise you will run into trouble. Internet access will be done via the FORWARDERS on the DNS server properties in the DNS management console on the Windows Server.
Best regards
Meinolf Weber
MVP, MCP, MCTS
Microsoft MVP - Directory Services
My Blog: http://blogs.msmvps.com/MWeber
Disclaimer: This posting is provided AS IS with no warranties or guarantees and confers no rights.
Twitter:

Allow transfer zone [DNS Service]

Hi,
I'd like to know what does "Allow Transfer Zone option" means in the created zone of a DNS service?
Is it good or bad?
I think that if this options in enabled ... another Administrator can publish your created zone in other DNS Server? so I think that it's bad an little bit insecure no?
Thanks

I'd like to know what does "Allow Transfer Zone option" means in the created zone of a DNS service?
It allows another DNS server to transfer the zone information that your DNS server is authoritative for. Normally this would be allowed only for master/slave servers within your organization. Usually the 'allow-transfer { addressmatchlist };' option is accompanied by a list of IP numbers of the master/slave servers that you wish to transfer zone information to. The 'addressmatchlist', in the option, is a comma separated list of dotted quad IP numbers for the allowed servers. Zone transfers are usually controlled with a cryptographic secret to authorize the transfer and prevent servers from 'spoofing' their identity as a trusted host. No key == no zone transfer.
Is it good or bad?
Its primary purpose is to speed up the resolution of DNS requests for other DNS servers that would be querying your zone on a regular basis for name resolution. If you have a number of internal DNS servers that need to resolve hosts in your organization you would normally allow zone transfers to those servers by adding their IP numbers to the 'addressmatchlist' portion of the option. This would reduce lookup times for hosts that query those DNS servers. So, yes, it is a good thing.

DNS Service DOWN ! Someone plz explain to me why !

Hi,
Please, can someone explain to me why i receive this message :
Server Server_Name BorderManager X.X.X.X DNS (Domain Name Service)
SVCDOWN
at 10:20:34
And when i check the status of the DNS at the proxy console all my DNS
are
up and running ???
What's going here ? And then i get the message that the DNS service is
back
online..
Thanks in advance. !!!
K. Chabot

One thing that i forgot to say, we use a software called What's Up tomonitor all our servers, Pix, router, etc....
Everytime i load named.nlm on a server and than i start monitoring it,
what's up is always telling me that the service is down after a while,
but
in fact the service is up. I'm wondering if named doesn't refresh or
do
something that what's up could interpret as a down and re-up again.
Any thought about this ?
By the way, i did roll back to 5.53 for the tcp like you suggested, @
first,
i got a fatal warning that a critical error happened and i couldn't
access
any nic card bind to tcp without an error, so i just re-initialize the
interface and reboot the server. It's now working, and i hope for a
long
long time !
Did you have any issues regarding the tcpip 5.93 with border manager
3.6 ?
Isn't novell gonna patch this in the next service pack or do we need
to back
it up before any future service pack ?
Again Craig, thanks a lot for your help !
K. Chabot
"K. Chabot" <[email protected]> wrote in message
news:AR77b.22112$[email protected]..
> Named i mean.
>
> "K. Chabot" <[email protected]> wrote in message
> news:6R77b.22111$[email protected]..
> > Yes Names was running on that server.
> >
> > "Craig Johnson" <[email protected]> wrote in message
> > news:[email protected]..
> > > Are you trying to run NAMED on that server by any chance?
> > >
> > > Craig Johnson
> > > Novell Support Connection SysOp
> > > *** For a current patch list, tips, handy files and books on
> > > BorderManager, go to http://nscsysop.hypermart.net ***
> > >
> >
> >
>
>

CANT FIND DNS SERVICE

Hi, I recently bought a mac mini with LION Server. I connect to mycomputer.local in admin tool and I see a bunch of services installed, some are running. I don't see the DNS service, and I dont see the option for Adding a service. One had that option in the server menu in add service in snow leopards server admin. How can I add a service in LION Server??

Download "Server Admin Tools", there you'll find it.
It's fine to install it in other machine than server.
Remember to upgrade, as it's ships in version 10.7.0.
Don't confuse this with the Server.app that cames in MacOSX server, they are different tools.
What mgsylvestre said is also valid, Server.app will "try to do all right with one click", but sometimes fails.
So if you need "fine tunning", don't want to "restart from scratch" and/or take more control over your service, take a look at Server Admin Tools.

Providing DNS Service

Hello,
I am come across some RFPs for Internet service where one of the requirements is for the ISP to provide DNS service to the customer. Is this something as simple as giving them the IP address of a DNS server to use or could it be something more?
Thanks in advance. All replies rated.

Hello,I
am come across some RFPs for Internet service where one of the
requirements is for the ISP to provide DNS service to the customer.
Is this something as simple as giving them the IP address of a DNS
server to use or could it be something more?Thanks in advance. All replies rated.
Hi,
If you see the concepts of DNS in internet is when ever you want to host your web server in internet and you dont have authorative dns server with you then we ask some of the ISP's to become a authorative DNS server for your web server which is exposed to internet.so when ever a request comes for your web site the authorative DNS server's ISP will resolve and provide the ip address of your web server to users.
and if you have DNS server at you own datacenter then we ask the root DNS server in internet to redirect the traffic for your web site to your own DNS server so that it can resolve the page and provide the ip address.
Hope to Help !!
Ganesh.H

DNS Services

Can the Time Capsule be configured for DNS duties.. for devices on LAN?
Currently I have Time Capsule in bridge mode; connected to another router (a BT HomeHub which provides rather nifty DNS server) but I would like to ditch the HomeHub and use just a basic ADSL modem instead.
Can anyone recommend a good ADSL modem for use with Time Capsule for connection to BT in UK?
Many thanks

your DHCP device can be defined to pass along additional DNS server location to your Mac's or PC's. In bridge mode, your getting DHCP from your up stream device. Setting up your network to require your Mac's and PC's to query the TC for DNS can be done, but all that does it add a hop in which the TC has to relay that request upstream. The TC does not have a DNS service in which it stores DNS entries and builds DNS tables on the fly.
if your ISP connection is ethernet cat5 or cat6, and your ISP provides DNS, why not just dump your hub and use the TC as your internet gateway? to do this, you would need to have your ISP register the mac address of your TC and change the config to share a single IP address instead of bridge mode.
do a config save before you make any changes in case you need to reload your old config. some times mac address changes by your ISP takes hours and you may not want to wait.

No DNS service

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